mandible

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mandible

1. the lower jawbone in vertebrates
2. either of a pair of mouthparts in insects and other arthropods that are usually used for biting and crushing food
3. Ornithol either the upper or the lower part of the bill, esp the lower part

mandible

[′man·də·bəl]
(anatomy)
The bone of the lower jaw.
The lower jaw.
(invertebrate zoology)
Any of various mouthparts in many invertebrates designed to hold or bite into food.